Improvement in capstans



` Qdimitri it "strut mijn.

VTo all whom 'tanay concern:

n. N. n.` oorrnv, Je., or NEWTON CENTRE, MASSACHUSETTS.

uLetters Patent No. 100,859, letedlllarch` 15, 1870.

www-

v IMPJaovr:Maru: IN cAPsTANs.

The Schedul'referred bo n these Letters Patent and making part of the same Beit known that 1, D. N. B. COFFIN, Jr., of Newton Centre, in the county of Middlesex, and State of Mas'- sachusetts, liave'finvented certain new and useful Im- 'ter-or first moving gear,` &c.

Figure 4 is a sectional view of the first moving gear, or center gear, its ratchet, rim, or plate, and the pawls,

r jointed by a non-traversing joint to'the leyer head.l i

Likeletters `refer tothe same or corresponding parts in all the iigures.

The bed ordtlcck-plate c has a` spindle, d. -On the spindle turns the barrel e, in case of the fast or simple 'Y purchase, by means oi`= the lever-headn, -through its pawls 5- and ratchett on the barrel, and in case of the vslower powerful purchase,through the-lever-head n, yits pawl or pawls p, ratchet rim or plate l, center gear k, and any suitable gearing communicating with and operating the barrel e.V

My improvements relate to the means employed for connecting disconnecting automatically the rst moving or centergear of 4a capstan to and from the lever-head, andt'o the means for lubricating, Ste.

` A separate and independent pawl or set of pawls, p, which are jointed so as not to traverse radially to the capstan, for changes are .jointed by a suitable hinge or pin to the lever-head. These pawls p act only upon the ratchet rim orpplate of the center getta-audit! no casedirectly upon `the capstan-barrel or its ratchetteeth.

A lim with ratchet teeth, in other words a ratchetplate, l, is` formed on or xed to the iirst moving or center ge'ar It.`

'llie pawls 1) are so arranged and jointed to the leverhead as to act on the teeth of the ratchet-plate l.

rlhese pawls 11 actua-tothe first moving gear through plate Il, whenever' the lever-head is turned in the proper direction 5` but when the head moves fin the-opposite direction, o1 .when the gears are rotatedV by the capstans working with the simple purchase, in either case these pawls 1J passer dragfreely over the ratchet rim or plate. f 1 L.,

Byfjoint-.ing the pawl or pawlswhich .move the first or center gear entirely separate and independently of those pawls or other means which may be employed to actnate the barrel directly, I secure very material advantages, irst, the ratchet-plate may be proportioned irrespective of the diameter of the top of the barrel, and made smaller if desired, so reducing the travel of its periphery when rotated by the operation of the capstan for. vthe fast or simple purchase; secondly, the

,pawls or other directconnections between the lever-` head and barrel are liable tobecome broken, when the pawls p, being separate, and jointed separately from them, are not thereby disabled, and the slowor powerful purchaseV remains perfect; thirdly, I secure yautomatic disconnection of the lever-head-from the center gear through the simple rotation of the'barrel for a simple or faster purchase.

The parts may be made of cast or wrought iron or other 'suitable materials.

Thus having described my improvements, Vhat I claim as myv own invention, and desire to se- .cure by Letters Patent, is as follows:

1. The arrangement of a ratchet or toothed rim directly in connection with the central or first actuating gear of a capstan above the main barrel-bearings, and

in combination with a non-traversing or local jointed. pawl or pawls connected to the lever-head, substantially as described.

2.` Constructing the ratchet-plate and central or first actuating gear of a capstan in one piece, substantially 'as showin 3. Seating the hubof those rotating parts of a capy stan which have a vertical or approximately Vertical axis direetlywithinan oil or other lubricator, receptacle, or rim, substantially as shown at 10,'g. 1. i 4. In combination with a set of pawls jointed to the lever-head for actuating the barrel of a capstan clirectly, the employment of another set, also jointed to the head, for actuating the barrel indirectly through ypmchase-gaining or speed-reducing gears, substantially as and for the purpose set forth.

5. Forming the center or first moving gear of a capstanr in one'pieee with its ratchet-plate, lsubstantiall y as shown.

6.In combination with the bottom hub of those parts of' a capstan which turn upon va vertical or approximately vertical axis, the forming of a relatively stationary oil-receptacle within whichsuch hub has its seat or bearing, substantially as shown at l0,`fig. I..

- D. N. B. GOFFIN, JR. Witnesses v J. D. SPAULDLNQ JOSEPH H. Lewis. 

